/Engine/Source/Runtime/Experimental/Chaos/Public/Chaos/StrainModification.h
Get an iterable range of unique geometry collection proxies which correspond to all strained clusters. Optionally, only include proxies for whom the strained parent is still the original root (ie, unbroken).
[FStrainedProxyRange](API\Runtime\Chaos\Chaos\FStrainedProxyRange) GetStrainedProxies ( bool bRootLevelOnly )